Compressor with dual compression chambers



g- 1959 B. J. ROCHLUS 2,898,034

COMPRESSOR WITH DUAL COMPRESSION CHAMBERS Filed April 1, 1957 INVENTOR. BERTRAM J. ROCHLUS ATTORNEYS United States Patent I COMPRESSOR WITH DUAL CHAlVIBERS COMPRESSION This invention appertains to compressors or pumps and more particularly to anovel device for continuously forcing fluids (air or liquids) in a substantially steady stream under pressure to a desired point.

One of the primary objects of my invention is to provide a dual compressor embodying a pair of compressor chambers with a common compressor plate operating in said chambers, the construction being such that as fluid is taken in one chamber, fluid is being compressed and forced out of the other chamber and vice versa.

Another salient object of my invention is to provide a compressor or the like embodying a compressor plate operating in chambers with novel means for imparting a desired motion to the plate in said chambers, whereby the fluid will be brought into the chambers and alternately compressed first in one chamber and then in the thcr and delivered to a common outlet, so that a substantially continuous, uninterrupted stream of fluid will be delivered to the outlet under a desired pressure.

A further important object of my invention is to provide a pair of crank discs operatively connected together for rotation in opposite directions having eccentric crank pins, carrying the compressor plate therewith, the crank pins being connected in a novel manner with the intermeshing gears utilized for rotating the discs so that upon rotation of the discs and gears, the compressor plate will be actuated in a substantially figure eight form of oscillating motion to bring about desired compression of fluid alternately in the chambers.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described and claimed, and illustrated in the accompanying drawing, in which drawing,

Figure 1 is a longitudinal sectional view through my improved compressor taken on the line 1-1 of Figure 3 looking in the direction of the arrows;

Figure 2 is a view similar to Figure 1, but taken on the line 22 of Figure 3, looking in the direction of the arrows and showing the intermeshing gears and the driving connection between the gears and the crank pins;

Figure 3 is a transverse sectional view through the compressor taken on the line 33 of Figure 1, looking in the direction of the arrows, and

Figure 4 is a top plan view of the valve plate which can be utilized in my compressor.

Referring to the drawing in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter ;C generally indicates my improved compressor and the same embodies a housing or casing 5 fabricated in any desired way. As illustrated, the housing or casing 5 includes a pair of like compression chambers 6 and 7 each of a substantially circular shape and having communication at their lower ends. The chambers are divided by a centrally disposed partition plate it which extends transversely of the casing and this partition terminates short of the lower end of the casing 5. The casing 5 includes circular end walls 1 and 2 and flat connecting side walls 3 and 4. One each side of the partition plate 8, the chambers 6 and 7 are provided with outlet ports 9 and 10. The upper end of the casing carries a bonnet 11 having a common outlet 12, for the ports 9 and 10. The ports 9 and 10 can be provided with oneway check valves, and as illustrated, I preferably employ a valve plate 13 firmly secured in position by the use of cap screws 14 utilized for holding the bonnet 11 in place and the valve plate is confined between the housing or casing 5 and the bonnet. This valve plate 13 is formed from resilient material and has struck out therefrom valve discs 15. These valve discs 15 are normally held in their closed position by the inherent resiliency of the material from which the valve plate is formed. The transverse partition wall 8 has formed therein a slideway 16 in which is mounted a sliding vane 17, the purpose of which will later appear. The lower communicating ends of the chambers 6 and 7 are connected by a common inlet passageway 18.

Rotatably mounted at their peripheries are crank discs 19 and 20 and these discs are disposed at one end of the valve chambers 6 and 7 and actually define in conjunction with wall 3 the sides of the chambers. Extending through the discs 19 and 24) are crank pins 21 and 22 and these crank pins carry a compressor plate 23. The compressor plate 23 operates within the chambers 6 and 7 and is of a one-piece construction and includes round end piston portions 24 and a connecting flat bridge portion 24. The piston portions 24 have rubbing contact with the circular walls of the chambers 6 and 7. The crank discs 19 and 20, and consequently, the crank pins 21 and 22 are turned in opposite directions, by means, which will now be set forth.

Rotatably mounted in rear of the discs 19 and 20 are intermeshing gears 25 and 26 and these gears are secured to shafts 27 at their axes and these shafts are rotatably carried by one wall of the housing or casing 5. One of the shafts 27 can be power driven.

As heretofore intimated, the crank pins 21 and 22 extend through the discs 19 and 2t and the inner ends of these crank pins carry rollers 28 received within 'U-shaped channel guide pieces 29 eccentrically secured to the intermeshing gears 25 and 26. Upon rotation of the gears 25 and 26, the crank pins 21 and 22 will be carried therewith as will the crank discs 19 and 29. The crank discs 19 and 29 are located oil center from that of their mating drive gears 25 and 26 in order to derive a variation in the speed of the crank discs necessary to maintain a constant distance between the crank pins 21 and 22 on which the compressor plate 23 is mounted.

The sliding vane 17 is constantly held in contact with the upper face of the compressor plate 23, as best shown in Figure 1. Spring means can be utilized for urging the vane into contact with the compressor plate, or the same can be urged inwardly by air pressure, as will now appear. The sliding vane confines the compressed gases within their respective compressionchambers 6 and 7 prior to being discharged through the ports 9 and 10.

In operation of my improved compressor and referring more particularly to Figure 1, it can be seen that during movement of the compressor plate 23, air will be admitted to chamber 7 through the air inlet 18, and as the valve disc 20 rotates in a counter-clockwise direction and as the compressor plate moves down and inwardly, the inlet 18 will be cut off and fluid will be trapped in the chamber 7. Upon upward movement of the plate in the chamber 7, the fluid will be compressed and forced out of port 10 past its flap valve 15 and through port 12. In the position of the compressor plate shown in Figure 1, fluid is being compressed in chamber 6 and is being forced out of its port 9 past its flap valve 15. Thus, as fluid is being compressed in one chamber, fluid is being admitted to the other. It will be noted that the slideway 16 communicates with the outlet 12 and consequently a pressure is maintained in the slideway 16 for holding the sliding vane 17 into engagement with the compressor plate.

Changes in details may be made without departing from the spirit or the scope of this invention, but what I claim as new is:

A compressor or the like comprising a housing having circular end walls and connecting inner and outer side walls, a central partition carried by the side walls and extending partially into the housing, intermeshing drive gears rotatably mounted at their axes in the housing, crank discs eccentrically mounted relative to the drive gears and located in front of the gears, said crank discs being rotatably supported in the housing at their peripheries, said circular end walls, the partition, the outer side wall and said discs defining a pair of substantially cylindrical compression chambers one on each side of the partition, said chambers having inlet ports at one side below the partition and outlet ports at the opposite side on each side of the partition, said chambers having communication at their lower ends below said partition, means for rotating one of said gears, crank pins extending through the discs toward the gears, channel shaped guide tracks rigidly secured to one face of the gears and eccentrically mounted thereon relative to the axes of the gears, rollers on the inner ends of the crank pins received in said channel guide tracks whereby upon rotation of the gears the crank pins and crank discs will be rotated in opposite directions with the crank pins moving in a circular path, a one-piece compressor plate including round piston terminal portions and a connecting fiat bridge portion, one piston portion being mounted in one chamber and the other piston portion being mounted in the other chamber, the fiat connecting bridge portion extending from one chamber to the other below the partition wall, the piston portions being rotatably mounted upon the crank pins, whereby upon rotation of said discs from the gears the movement of the piston terminal portions will be planetary in respect to the circular compression chambers and whereby the compressor plate will have a figure eight oscillating motion, said piston portions having rubbing contact with the circular wall of said chambers, a sliding vane carried by the partition, and means normally urging the sliding vane into intimate contact with the flat bridge portion of the compressor plate, said compressor plate having sliding and rubbing contact with the vane, the outer side wall, the discs and the circular end walls during movement of said plate.

References Cited in the file of this patent UNITED STATES PATENTS 46,457 Ellis Feb. 21, 1865 96,262 Pilliner et al. Oct. 26, 1869 720,542 Wharton Feb. 10, 1903 1,041,606 Dembrowsky Oct. 15, 1912 1,312,838 Dembrowsky Aug. 12, 1919 1,401,443 Richer et al Dec. 27, 1921 1,900,416 Izbicki Mar. 7, 1933 FOREIGN PATENTS 719,210 France Nov. 14, 1931 

